The word before isn't a verb and so doesn't have any tenses.
"Responsible" is an adjective. It does not have a past tense. Instead, the past tense would apply to the word before. (Present - she is responsible, Past - she was responsible.)
Rode is the past tense of ride. Ridden is the past participle. I rode a horse yesterday. (past tense) He has ridden a horse before. (present perfect tense)
The past perfect tense.
There is no past tense of ajar. Perhaps you can add 'was' before ajar?
before its synonym of presently
"had felt" is in the past perfect tense. It is used to show an action that occurred before another action in the past.
The past perfect tense of do is had done.
The tense of "they had left the mall before noon" is past perfect. Past perfect tense is formed by using the auxiliary verb "had" followed by the past participle of the main verb. It is used to indicate an action that was completed before another action in the past.
Had believed is in the past perfect tense. It is used to indicate an action that was completed before another action in the past.
happen before another event or time in the past.
Did is the past tense of do. Have done is present perfect.
The past tense of "lay" is "laid." For example: "I laid the book on the table."